/*
 * Copyright 2021-2023 NoSugarIce
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.nosugarice.mybatis.criteria.clause;


import java.util.Collection;

/**
 * @author dingjingyang@foxmail.com
 * @date 2020/12/19
 */
public interface Select<C, X extends Select<C, X>> {

    /**
     * 去重
     *
     * @return X
     */
    X distinct();

    /**
     * 查询特定字段
     *
     * @param columns 一组列
     * @return X
     */
    X select(Collection<C> columns);

    /**
     * 查询结果排除特定字段
     *
     * @param columns 一组列
     * @return X
     */
    X exclude(Collection<C> columns);

    /**
     * 聚合字段
     *
     * @param sqlFunction 函数
     * @param column      列
     * @param alias       别名
     * @return X
     */
    X expand(SQLFunction sqlFunction, C column, String alias);

    X count(C column);

}
